Steam set-works for sawmills.



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Patented Feb. I3, |900.

No. 643,453. 1 R. F BARKER STEAM SET WORKS FOR SAWMILLS.

(Application led Aug. 16, 899.)

4 Sheets-Sheet 2.

(No Model.)

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STEAM SET WORKS FDR SAWNIILLS.

(Application led Aug'. 16, v1899.)

4 Sheets-Shen 3 (No Model.)

no. 643,453. Patnted Fen. I3, |900. n. F. BARKER.

STEAM SET WORKS FUR SAWMILLS.

(Application led Aug. 16, 1899.)

(N0 NUGGI.) 4 Sheets-Sheet 4.

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RUBEN F. BARKER, OF MARINETTE, WISCONSIN, ASSIGNOR OF ONE-HALF TO MICHAEL OORRY, OF SAME PLACE.

STEAM SET-WORKS FOR SAWMILLS.

SPECIFICATION forming part of Letters Patent No. 643,453, dated February 13, 1900.

' Application filed August 16, 1899. Serial No. 727,407. (No model.)

To all whom, t may concern.-

Be itknown that I, RUBEN F. BARKER,a citizen of the United States, and a resident of Marinette, county of Marinette, and State of Wisconsin, have invented certain new and useful Improvements in' Steam Set-Works for Sawmills, of which the following is a specification, and which are fully illustrated in the accompanyin g drawings, forming a part thereof.

This invention relates to means for providing an adjustable stop to limit the range of movement of the setting mechanism; and its object is to simplify the construction of such devices and to provide for greater ease and simplicity of adjustment.

The invention consists in the parts and arrangement of parts, as hereinafter fully de scribed and as illustrated in the accompanying drawings, in which- Fignre l is a detail plan View of a carriage and the set-works mounted thereon. Fig. 2 is a vertical longitudinal section of the power mechanism for controlling the set-works,some of the parts being shown in elevation. Fig. 3 is a plan, partly in section, on the line 3 3 of Fig. 2. Fig. 4 is a detail plan, partly in section, on the line 4 4 of Fig. 2. Fig. 5 is a sectional view on the line 5 5 of Fig. 2. Fig. 6 is a detail view on the line 6 of Fig. 5, and Figs. 7 and 8 show details of a ratchet-pawl employed in the device.

For the purpose of clearness I have shown in the drawings many of the parts of a sawmill-carriage and its appurtenances which are in common use. Such partslhave notde'emed it necessary to show in detail, as their importance in this connection resides merely in the relation of the parts.

The sills of a log-carriage are shown at 10 and 11, and some of the wheels for supporting the carriage are shown at 12.

At 13 is shown the ways for one of the headblock knees 14, and at 15 is shown the setshaft for controlling the head-blocks. This shaft is provided with any suitable means for retracting the blocks, such as the spring 16, and its advance movement is accomplished by means of a ratchet-wheel17, fixed upon it, and pawls 18, cooperating therewith and actuated by a rocker-shaft 19. This rockershaft is oscillated by means of a steam-cylinvstandards or knees of the head-blocks. -stop mechanism consists of a lever-like arm .29, pivoted at 30 to a lug or bracket formed der 20, its piston 2l, and piston-rod 22, the piston-rod 22 being provided with a crosshead 23, having at each of its ends a gearrack 24, each of which intermeshes with a Seg.

of movement of the piston 21, and consequently of the shaft 19, and through them the advance movement of the shaft 15 and the This upon the bed-plate 3l, by means of which the power mechanism is adapted for attachment to the carriage. This arm sweeps a segmental ratchet or quadrant 32, suitably supported by the power mechanism. The arm is provided with a spring-pawl 33 for engaging the teeth of the ratchet, this pawl being manually controllable by means of a bell-crank 34 in position to be grasped by th'e hand of the operator as he grips the arm to move it. The arm 29 is provided with a contact-face 29, which lies in the path of the cross-head 23, and thus limits the forward movement thereof. The angular position of the arm 29 determines the stroke of the piston, the outward-movement of which is stopped by the arm, the impact being sustained by the pivot 30 and the ratchet 32. The pivot 30 is located as near as practicable to the cross-head 23 and still provide a sufficient range of movement of the contact-face 29. The pivot 30 maybe regarded as the fulcrum ofthe lever, and as it is located much nearer the point of impact of the cross-head than is the pawl 33 it carries the major portion of the burden. The lower end ofthe arm 29 is preferably bifurcated, so that it may be located centrally as to the cross-head 23, the shaft 22 passing between its legs. The segmental ratchet 32 is preferably slotted, the arm 29 passing through its slot, and the nose 35 of the pawl IOO l33 is of sufficient length to engage both sides of the ratchet. The body of the pawl is bifurcated to receive the arm 29, to which it is pivoted. Along one side of the segmental ratchet 32 is located a graduated lineal scale 36, over which plays a linger 37, secured to the arm 29. The thickness of board cut from the log is determined by the position of the arm 29, and the scale 36 is so placed that the mark thereon indicated by the finger 37 designates the thickness of the board. In practice it is found advisable to cut the logs into boards or planks of diierent thicknesses, and it is necessary that the set-works be easily and quickly adjusted to make each cut as may be directed by the foreman. It is obvious that if the ratchet 32 be provided with teeth of sulicient iineness to adapt the machine for a tine grading of lumber as to thickness it will be difiicult for the operator to quickly and accurately set the log if reliance is had only upon the graduated scale 36. To overcome this difficulty, I provide removable templets 38 or auxiliary ratchetplates adapted for attachment to the segment, each having notches or teeth for the reception of the pawl 33, correspondingin location with the several dimensions into which the material being operated upon is to be out, the remainder of the face of the plates being plain and projecting above the teeth of the ratchet 32, the teeth 40 in the templet being, however, of suicient depth to allow the pawl to engage the ratchet-teeth when it falls into them. The nose of the pawl is laterally extended, as shown at 41so as to cooperate with the templet.

The mill operatorinvariably acts under instructions to cut the particular material being operated upon into certain specified thickuesses-as, for example, one inch, one and one-fourth inches, and two inches-and the Sawyer, being governed by the appearance of the log after each cut, indicates to the setworks operator the thickness of the next board to be cut. In preparation for cutting the material to be operated upon the operator applies to the quadrant the plates corresponding with the dimensions stated in the order, or specially prepares one by the use of a tile by cutting the teeth at the proper locations. The templet or plate having been applied, the setter has to concern himself only with the several sets of teeth with which it is provided, so that he can without the necessity of close scrutiny shift the lever 29 to the desired position.

I claim as my inventionl. In a sawmill set-works, in combination,

a reciprocating head, a lever-like stop-arm crossing the path of the head and being piv- Voted at one side thereof, and means for ador quadrant for cooperating with the swinging end of the stop-arm, and a pawl carried by such arm for engaging the ratchet or quadrant.

3. In a sawmill set-works, in combination, a reciprocating part, an adjustable lever-like stop for determiningthe range of movement of such part, a removable notched plate for determining the positions to which the stoparm may be adjusted, and a pawl carried by such stop arm for cooperating with the notched plate.

4. In a sawmill set-works, in combination, a reciprocating head, a lever-like stop-arm crossing the path of the head and being pivoted at one side thereof, a segmental frame cooperating with the arm, a plate adapted to be removably secured to the frame and having notches so disposed as to determine the adjustment of the stop-arm, and a pawl carried by such arm for engaging the notches of the plate.

5. In a sawmill set-works, in combination, a steam-cylinder, a piston reciprocating therein, a piston-rod leading from the piston, a cross-head fixed to the piston and having longitudinally -disposed gear-racks, a rockershaft having segmental gears intermeshing with the racks, a lever-like stop-arm crossing the path of the cross-head and pivoted at one side thereof, a segmental ratchet cooperating with the stop-arm, a pawl carried by such arm for engaging the ratchet, a removable templet for closing the teeth of the ratchet not desired for service against the entry thereinto of the pawl.

6. In a sawmill set-Works, in combination, a reciprocating part for actuating the setting mechanism, an adjustable lever-like stoparm for limiting the range of movement of the reciprocating part, a segmental ratchet, a pawl carried by the stop-arm for cooperating with the ratchet and a removable notched templet adapted to be secured to the ratchet to prevent the engagement of the pawl with any of the teeth thereof except such as correspond with the notches of the templet.

RUBEN F. BARKER. IVitne'sses:

W. W. SKINNER, M. O. KoHLnR.

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